(1) The photoalkylation of 1,1-diphenylethenes with acetonitrile in the presence of benzophenone/t-butylamine.(2) Dibenzo[a,d]cycloheptenimines and benzocycloheptenimines which have medicinal activity have interested. We have developed the new synthetic routes by the photoamination. In order to enhance the efficiency of the photoamination of benzocycloheptenes, we applied to redox-photosensiitization using 1,3,5-triphenylbenzene as a sensitizer.(3) Moreover, the photochemical transformation of N-alkyldibenzo[a,d]cycloheptenimines was performed by the 9,10-dicyanoanthracene-photosensitization.(4) In order to develop the visible-light induced photodeclorination of chlorophenols, we investigated the photoreaction of the silica-gel supported teteraphenylporphynatoantimony complex in aqueous solution.